PDP用BaAl_(12)O_(19):Mn^(2+)荧光粉表面包覆MgF_2研究(英文)

Research of Coating BaAl_(12)O_(19):Mn^(2+) Phosphors with MgF_2

采用非均相成核法在PDP用BaAl12O19:Mn2+绿色荧光粉表面包覆MgF2晶体。通过精确控制包覆工艺参数,XRD,SEM和TEM分析表明荧光粉表面包覆一层厚度约40~50 nm均匀致密的MgF2晶体。包覆荧光粉空气中600℃灼烧一小时后相对亮度为99%,抗热劣化性能明显提高。

BaAl12O19 ：Mn^2＋ phosphors were coated with a uniform compact MgF2 film according to the heterogeneous nucleation method. By precisely controlling the parameters of coating process, XRD and SEM analysis confirm the phosphors were coated with a uniform compact MgF2 film. TEM analysis indicates the thickness of the MgF2 film is about 40-50 nm. The property of resistance to thermal degradation is promoted obviously by coating BaAl12O19 ：Mn^2＋ phosphors with MgF2. The relative luminance of coated phosphors after baking at 600℃ for an hour in air reaches 99%.